t 
180 FLORA OF WINNESHIEK COUNTY. 
Polygonum tenue Michx. Slender Knotweed. Locally com- 
mon in dry sandy soil. Decorah (Holway), the St. Peter sand- 
stone region near Hesper. 
Polygonum douglasiti Greene. Douglas’ Knotweed. (Not 
included in Gray.) With the preceding in the vicinity of Hes- 
per, and even more abundant. 
Polygonum convolvulus L. Black Bindweed. A common 
introduced weed. Calmar, Hesper, etc. 
Polygonum scandens L. (P. dumetorwm var. scandens Gray.) 
Climbing False Buckwheat. Reported by Fitzpatrick. 
Polygonum sagittatum L. Arrow-leaved Tear-thumb. In low 
grounds. Reported by Fitzpatrick. 
Order 8. Chenopodiales. 
Family 1. Chenopodiacee. 
Chenopodium album L. Lamb’s Quarters. A common intro- 
duced weed. Reported by Fitzpatrick. 
Chenopodium glaucum L. Oak-leaved Goosefoot. A common 
introduced weed. Calmar. 
Chenopodium hybridum L. Maple-leaved Goosefoot. Common. 
in woods. Decorah. : 
Salsola tragus. Russian Thistle. Introduced. Not common. 
Calmar. 
Salsola kali L. Salt-wort. 
. Family 2, Amaranthacee. 
Amaranthus retroflecus L. Rough Pigweed. A very com- 
mon introduced weed. Ft. Atkinson, Decorah (Goddard). 
Amaranthus blitoides S. Wats. Prostrate Pigweed. Intro- 
duced from the west. A common weed. Ft. Atkinson, ete. 
Family 3. Nyctaginaceae, 
Allionia nyctaginea Michx. (Oxybaphus nyctagineus Sweet.) 
Wild Four-o’clock. Common in dry open places. Calmar. 
Family 4. Azoiacee. 
Mollugo verticillata L. Carpet-weed. Common in sandy and 
waste grounds. Ft. Atkinson. 
Family 5. Portulacacee. 
Claytonia virginica L. Spring Beauty. In rich alluvial 
woods. (Fitzpatrick.) : 
